Millie McCall wakes up anticipating a bright and beautiful Saturday morning. What she gets is a rain-soaked day of gloom and boredom. Desperate for something to do, Millie decides to tackle the job of cleaning her messy closet -- a job she has always managed to put off and forget. During the process of throwing things away, she comes across a box that turns out to be instrumental in changing her attitude not only about the day but her life as well. The importance of this lesson becomes more evident when Millie's horrible, boring, rainy afternoon turns into something totally unexpected for both her and the reader.